Close one point of contact; reopen another

Tigran Petrosian — Boris Spassky · World Championship, Moscow · 1966.04.18

Complete legal positionLoading progress…

Decision position · White to move

Pawn structure and mobility

White occupies d4 with pawns and controls d5, e5 with pawn attacks; Black occupies d5 with pawns and controls e4, d5 with pawn attacks. White has 11 legal pawn move choices in this position. Pawn control is geometric, including pinned pawns; legal mobility accounts for king safety. Neither count is an engine evaluation.

White

Isolated pawns: None
Doubled files: None
Passed pawns: None
Blocked ahead: d4 by d5, f2 by f3
Pawn chains: a2–b3–c4; f2–g3–h2

Black

Isolated pawns: None
Doubled files: None
Passed pawns: None
Blocked ahead: d5 by d4, f7 by f6
Pawn chains: b5–c6–d5–e6–f7

White's legal pawn moves: c5, cxb5, cxd5, b4, g4, a3, a4, e3, e4, h3, h4

Compare the capture with keeping tension

White's c4-pawn and Black's b5-pawn attack each other geometrically. Compare the recaptures and newly opened lines before exchanging; the contact alone does not prove that either capture is legal or good.

Study this pawn idea

Identify the chain's support

White's pawn chain on a2, b3, c4 has a2 at its base. Test whether pressure on that support changes the advanced pawns' stability; piece placement and tactics determine whether a break works.

Study this pawn idea

Learn the plans behind these pawn structures →

Think before revealing

Why can White close with c5 and later open with e4 without contradicting the original plan?

Diagnose → choose → calculate → explain the transformation. Consider the opponent’s best resistance, not just the move you want them to make.

Your reasoning

What is the pawn situation?Your candidate and intended improvementOpponent’s reply; what changes after the final recapture?

4 · Reflect & return

Can you explain the gain, the concession and the opponent’s plan without reading the notes? Self-rate your understanding to schedule another look. This is a learning record, not an engine grade.

Sources & teaching context

Adapted from the supplied Pawn Play Atlas and Central Pawn Play materials. Unknown historical details remain unknown; illustrations are distinguished from full games.

Historical score / source 1

Open narrated assignment →

Transfer the idea

Try it in a different setting.

Study as a curriculum →

Close one point of contact; reopen another

Tigran Petrosian — Boris Spassky · World Championship, Moscow · 1966.04.18

Complete legal positionLoading progress…

Decision position · White to move

Pawn structure and mobility

White

Isolated pawns: None
Doubled files: None
Passed pawns: None
Blocked ahead: d4 by d5, f2 by f3
Pawn chains: a2–b3–c4; f2–g3–h2

Black

Isolated pawns: None
Doubled files: None
Passed pawns: None
Blocked ahead: d5 by d4, f7 by f6
Pawn chains: b5–c6–d5–e6–f7

White's legal pawn moves: c5, cxb5, cxd5, b4, g4, a3, a4, e3, e4, h3, h4

Compare the capture with keeping tension

Study this pawn idea

Identify the chain's support

White's pawn chain on a2, b3, c4 has a2 at its base. Test whether pressure on that support changes the advanced pawns' stability; piece placement and tactics determine whether a break works.

Study this pawn idea

Learn the plans behind these pawn structures →

Think before revealing

Why can White close with c5 and later open with e4 without contradicting the original plan?

Diagnose → choose → calculate → explain the transformation. Consider the opponent’s best resistance, not just the move you want them to make.

Your reasoning

What is the pawn situation?Your candidate and intended improvementOpponent’s reply; what changes after the final recapture?

4 · Reflect & return

Can you explain the gain, the concession and the opponent’s plan without reading the notes? Self-rate your understanding to schedule another look. This is a learning record, not an engine grade.

Sources & teaching context

Adapted from the supplied Pawn Play Atlas and Central Pawn Play materials. Unknown historical details remain unknown; illustrations are distinguished from full games.

Historical score / source 1

Open narrated assignment →

Transfer the idea

Try it in a different setting.

Study as a curriculum →